I am running an Ice 2 120HV with a 4525 520 Ultimate in my Kasama and found the ESC to run much cooler on 8 kHz, power seemed the same...not the same motor but just to show the 8kHz setting worked fine..

It’s good to try different PWM settings to see what works best. Just NEVER try to use the outrunner mode with a helicopter.

I recently got an Ice Lite 50, still running 3.27. It's a 450 with a Turnigy 2218 outrunner motor. I've been using Outrunner PWM timing, though I just set it to 12kHz for my next flights, to try that out. I think I have timing at Medium.

I haven't noticed any problems with Outrunner. What does it do worse than 8 or 12kHz?

I recently got an Ice Lite 50, still running 3.27. It's a 450 with a Turnigy 2218 outrunner motor. I've been using Outrunner PWM timing, though I just set it to 12kHz for my next flights, to try that out. I think I have timing at Medium.

I haven't noticed any problems with Outrunner. What does it do worse than 8 or 12kHz?

It sometimes makes the motor and ESC run hotter That’s because it runs a high PWM most of the time when it’s not really needed. In come cases it also makes for unsteady governor operation. If the motor manufacture recommends 8 then the outrunner mode will be the furthest off from the optimal setting resulting in slightly lower motor efficiency. The lowest PWM that gives satisfactory results is probably the most efficient, however if the motor manufacture recommends something else use that setting.

If you are not aware the outrunner mode is a variable PWM frequency mode that’s needed for high pole count motors that run at a very wide range of speeds, typical airplane operation. Helicopters run at a constant RPM in a fairly narrow speed range and we use relative low pole count motors so that’s not really needed.

Thanks, I understand it a bit better now I was just going by the fact that mine is an outrunner Interestingly, my motor & ESC have stayed quite cool (motor barely above ambient, and I think ESC has peaked around 130F or so (maybe a bit higher) in maybe 70-80F weather.

I don't think my $20 HobbyKing motor had any sort of documentation/suggestion for settings

I tried the PWM formula on my motor, and got about 12KHz, so that is at least a nudge in the right direction. I can try 8KHz as well and see if it does anything weird.

I'm a new CC-ICE user and when I downloaded the castle link software there was a warning that the new software would make motors run hotter/faster than previous. I can't find this when I look back at the website again though. I understand new firmware requires re-calibration of throttle, so for a first time use (i.e. brand new set-up) this warning is no problem?
I'm a long-standing SK270 user and haven't figured out yet what I'll do about governing (I seldom used it on my scale helis).

I'm a new CC-ICE user and when I downloaded the castle link software there was a warning that the new software would make motors run hotter/faster than previous. I can't find this when I look back at the website again though. I understand new firmware requires re-calibration of throttle, so for a first time use (i.e. brand new set-up) this warning is no problem?
I'm a long-standing SK270 user and haven't figured out yet what I'll do about governing (I seldom used it on my scale helis).